<template>
  <div class="login-container">
    <div class="log-box">
      <!-- 头像区域 -->
      <div class="avatar-box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!-- 登录表单区域 -->
      <el-form ref="loginFromRef" :model="loginFrom" :rules="loginFromRules" label-width="0px" class="login-from">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginFrom.username" prefix-icon="el-icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginFrom.password" prefix-icon="el-icon-lock" type="password"></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetBtn">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
  export default {
    name:'Login',
    data() {
      return {
        //登录表单的数据绑定对象
        loginFrom:{
          username:'admin',
          password:'123456'
        },
        //登录表单的验证规则对象
        loginFromRules:{
          //用户名验证
          username:[
            { required: true, message: '请输入登录名称', trigger: 'blur' },
            { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
          ],
          //密码验证
          password:[
            { required: true, message: '请输入登录密码', trigger: 'blur' },
            { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
          ]
        }
      }
    },
    methods: {
      //点击重置按钮重置表单
      resetBtn(){
        this.$refs.loginFromRef.resetFields()
      },
      login(){
        this.$refs.loginFromRef.validate(async vali => {
          if(!vali) return;
          const result = await this.$http.post('login',this.loginFrom);
          const {data} = result;
          // console.log(data);
          if(data.meta.status !== 200){
            this.$message.error('登录失败!');
          }else {
            this.$message.success('登陆成功!');
            //将登陆成功后的token保存到客户端sessionStorage中
            //(因为项目除了登陆之外的其他接口,都是在登录之后才能访问;token只能在当前网站有效，所以token保存到sessionStorage)
            window.sessionStorage.setItem('token',data.data.token);
            //通过编程式导航实现路由跳转
            this.$router.push('/home');
          }
        })
      }
    },
  }
</script>

<style scoped>
  .login-container{
    position: relative;
    height: 100%;
    background-color: #2b4b6b;
  }
  .log-box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
  }
  .avatar-box {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 100%;
    background-color: #fff;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
  }
  .avatar-box img{
    width: 100%;
    height: 100%;
    border-radius: 100%;
    background-color: #eee;
  }
  .btns{
    display: flex;
    justify-content: flex-end;
  }
  .login-from{
    margin: 110px 0;
    padding: 0 20px;
  }
</style>
